UV Index in Santo Tomas, Mexico

Last updated: May 3, 2025

Understanding the UV Index is essential for residents and visitors of Santo Tomas, Mexico, where the sun shines brightly throughout the year. Knowing the daily UV levels can significantly aid in sunburn prevention and promote long-term skin health, safeguarding you from harmful effects such as skin cancer. With a BSk climate that features hot summers and mild, dry winters, Santo Tomas experiences notable UV exposure risks, especially from late morning to early afternoon when UV levels can peak at an intense 13. Stay informed, and enjoy the sun safely!

Hourly UV Index in Santo Tomas

As the day unfolds, the UV Index ramps up significantly, peaking during the midday hours. At 07:00, it starts at a gentle 1, barely warranting concern. By 09:00, it rises to 4, signaling a gradual increase in sun intensity. However, it’s at 11:00 that the UV Index surges to a powerful 10, reaching 13 by 12:00 and 13:00, urging everyone to seek shade and slather on sunscreen. The intensity tapers off into the afternoon, dropping to 12 at 14:00, before gradually fading to 10 by 15:00, and then continuing its descent to 4 at 17:00. As the sun sets, the UV Index recedes to a safe 2 at 18:00 and finally retreats back to 1 by 19:00. It's a brilliant reminder of how vital it is to stay sun-safe during those peak hours!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	2	low	45 min
09:00	4	moderate	30 min
10:00	7	high	25 min
11:00	10	very high	15 min
12:00	13	extreme	10 min
13:00	13	extreme	10 min
14:00	12	extreme	10 min
15:00	10	very high	15 min
16:00	7	high	25 min
17:00	4	moderate	30 min
18:00	2	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Santo Tomas

Throughout the year, the UV Index shows significant seasonal changes, with the highest readings occurring from March to September. These months see extreme levels, peaking at 14 in June, with a consistent burn time of just 10 minutes. The high-risk months for UV exposure are February to October, especially March through September. Residents and visitors are strongly advised to take precautions during these times, such as wearing sunscreen, protective clothing, and sunglasses, and seeking shade, particularly during peak sun hours. As the UV Index dips in November and December, attention to sun safety remains important, with high categories still in place.

Monthly Maximum UV Index for Santo Tomas, Mexico

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Santo Tomas. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Santo Tomas, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Santo Tomas UV Index with Other Mexico Cities

The table above highlights how UV exposure in Santo Tomas compares to other major locations across Mexico. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Santo Tomas's solar exposure compared to other cities in Mexico. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Santo Tomas	6	9	11	13	13	14	13	13	12	10	8	6
Guadalajara UVI	9	11	14	14	14	13	13	13	13	12	9	8
Iztapalapa UVI	10	12	14	15	14	14	14	14	14	12	10	8
Ecatepec de Morelos UVI	10	12	14	15	15	14	14	13	14	12	10	8
Mexico City UVI	10	12	14	15	15	14	14	13	14	12	10	8
Puebla UVI	10	12	14	15	15	15	15	14	14	13	10	9